Preparation method and device of microorganism directional mineralization sludge solidification desilting body

Abstract

The invention belongs to the technical field of sewage treatment, and discloses a microbial directional mineralization sludge solidification desilting body preparation method and device, and the method comprises the following steps: S1, storing sludge slurry in a solidification pool; s2, preparing a high-concentration complex microbial inoculant solution; s3, adding the complex microbial inoculant solution and the glue solution prepared in the step S3 into a curing tank in proportion, and mixing through stirring equipment; and S4, pressurizing and dehydrating the reacted sludge system to obtain the microorganism directional mineralization sludge solidification desilting body. According to the scheme, after the impurities in the original sludge are removed, the sludge slurry is stored in the curing tank, then the complex microbial inoculant liquid and the mixed solution of urea and calcium acetate are added into the curing tank according to the proportion, the mixture is stirred and subjected to standing maintenance for 6-12 hours, and then the mixture is pressurized and dehydrated; and finally, the microorganism directional mineralization sludge solidification desilting body is obtained, and the problem that energy consumption and cost are sharply increased due to large-scale sludge solidification treatment in a heating mode is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sewage treatment, and specifically relates to a preparation method and device of a sludge solidification and dredging body prepared through microbial directional mineralization. BACKGROUND

[0002] Sludge is fine-grained sediment formed through biochemical action in still water or slow-flowing water environment, and is a cohesive soil with low strength and slow consolidation; usually, sludge has very high water content (usually > 90%) and low mechanical strength, and has strong compressibility, and has very poor anti-seismic performance, and is prone to causing building foundation subsidence under the action of strong earthquakes, so when engineering construction is carried out on a sludge site, effective solidification treatment needs to be carried out on the sludge.

[0003] For example, the application with the application number CN202310683824.2 relates to the technical field of sludge treatment, and discloses a sludge solidification and ecological improvement solidification device, which comprises a device shell and a collection box, and a movable blocking plate is slidably connected in the interior of the device shell, and a stirring barrel is attached to the top of the movable blocking plate. The sludge solidification and ecological improvement solidification device and the operation method thereof effectively solve the problem that in actual use, when the device dehydrates sludge, it adopts a mode of extruding the sludge to dehydrate the sludge, and part of the sludge will overflow from the extrusion equipment in the extrusion process, so that the device cannot effectively dehydrate the sludge, thereby causing low dehydrating efficiency of the device, and the dehydration speed of the sludge is accelerated by clamping and heating the sludge in the barrel in the entire operation process, so that the phenomenon of sludge overflow in the device can be effectively prevented, and the dehydrating efficiency of the device on the sludge can be greatly improved, thereby greatly improving the working efficiency of the device.

[0004] The above scheme places the sludge in the barrel and evaporates the water source in the barrel by heating the sludge, and this mode of simply evaporating water by heating has very high energy consumption, thereby greatly increasing the treatment cost of the sludge. Therefore, in order to solve the above problem, a preparation method and device of a sludge solidification and dredging body prepared through microbial directional mineralization are provided. SUMMARY

[0005] To solve the problems in the background art, the present application provides a preparation method and device of a sludge solidification and dredging body prepared through microbial directional mineralization, which solves the problem that large-scale sludge solidification treatment by heating will cause sharp increase in energy consumption and cost.

[0006] To achieve the above object, the present application provides the following technical scheme: a preparation method of a sludge solidification and dredging body prepared through microbial directional mineralization, comprising the following steps: S1, remove impurities in the original silt, and determine its initial moisture content and organic matter content, adjust the moisture content of the silt to 60%-80% to form a flowing silt slurry, and store the silt slurry in a curing pool; S2, the ratio of the number of viable bacteria of Paenibacillus and Bacillus licheniformis is 3:1, after centrifugal concentration, add the compound protective agent containing yeast extract, proteose peptone, trehalose and glycerol, and prepare the high-concentration compound bacterial agent liquid with the concentration of viable bacteria not less than ; S3, the compound bacterial agent liquid prepared in step S2 is added to the curing pool in S1 at the mass ratio of CFU bacterial cell number to 1 kg of dry soil, and the glue solution is added at the volume ratio of compound bacterial agent liquid to glue solution of 2:1, then mixed by stirring equipment, and after mixing, the curing is carried out for 6-12 hours, the glue solution is a mixed solution of urea and calcium acetate; S4, vacuum preloading or pressurized dewatering is carried out on the silt system after reaction, the vacuum degree of vacuum preloading is 80-95kPa, the pressure of pressurized dewatering is 50-200kPa, and the dewatering time lasts for 24-48 hours; then sealed curing is carried out at 20-30℃ for 7-14 days, and the microbial directional mineralization silt solidification dredging body is obtained.

[0007] Preferably, the concentration of urea and calcium acetate in the glue solution in S3 is 0.5-1.5mol / L.

[0008] Preferably, the curing time in S3 is 9 hours.

[0009] Preferably, the dewatering step in S4 adopts vacuum preloading, the vacuum degree is 90kPa, the pressure of pressurized dewatering is 100kPa, and the dewatering time is 36 hours.

[0010] The application also provides a microbial directional mineralization silt solidification dredging body preparation device, which comprises the stirring equipment in S3, and the stirring equipment comprises a support spindle, a single-cylinder engine and a stirring paddle assembly; The single-cylinder engine is fixedly installed at one end of the support spindle, the stirring paddle assembly is rotatably connected to the other end of the single-cylinder engine, the output end of the single-cylinder engine is a transmission shaft which is movably sleeved in the support spindle, and one end of the transmission shaft is in transmission connection with the stirring paddle assembly.

[0011] Preferably, a handle is fixedly connected to the support spindle.

[0012] Preferably, a flow baffle is fixedly installed at the end of the support spindle close to the stirring paddle assembly.

[0013] Preferably, a protection mechanism is mounted on the support spindle; the protection mechanism comprises a support rod hinged to the support spindle and close to the stirring paddle assembly, the other end of the stirring paddle assembly is hinged with a connecting rod two, the connecting rod two is hinged with a connecting rod one parallel to the axis direction of the support spindle, the other end of the connecting rod one is hinged with the support rod, the rod body part of the connecting rod two is fixedly connected with a sleeve piece, the support shaft is rotatably connected to the sleeve piece, the top end and the bottom end of the support shaft can extend to the outside of the sleeve piece and are fixedly connected with a magic tape bandage. When the support spindle is inclined, the height of the bottom end of the support rod is lower than the height of the bottom of the stirring paddle assembly.

[0014] Preferably, the bottom of the connecting rod two is hinged with a spring telescopic rod, and the top end of the spring telescopic rod is hinged with the connecting rod one.

[0015] Preferably, the stirring paddle assembly comprises a stirring paddle body rotatably connected to the bottom end of the support spindle and axially movable at the bottom end thereof, the part of the stirring paddle body located inside the support spindle is provided with a flange part and a friction disc two, the stirring paddle body is further sleeved with a spring piece, the bottom end of the cavity of the support spindle is further movably sleeved with a circular ring plate two, and the two ends of the spring piece are fixedly connected with the flange part and the circular ring plate two, respectively. The bottom end of the transmission shaft is a friction disc one, and the stirring paddle body subjected to the elastic force of the spring piece can be frictionally connected through the friction between the friction disc two and the friction disc one.

[0016] Preferably, the cavity of the support spindle is fixedly connected with a circular ring plate one located between the flange part and the friction disc two, and the circular ring plate one is movably sleeved on the outer periphery of the shaft body part of the stirring paddle body. The bottom end of the support rod is a spring combined piston telescopic rod, one side of the circular ring plate one towards the flange part is fixedly connected with a group of hydraulic piston telescopic jacks in a symmetrical direction, one end of the hydraulic piston telescopic jacks is fixedly connected with an oil channel pipeline, and one end of the oil channel pipeline extends to the outside of the support spindle and is fixedly connected with the top end of the spring combined piston telescopic rod.

[0017] Preferably, a plurality of balls are arranged in a ring array on one side of the circular ring plate one towards the friction disc two.

[0018] Preferably, a plurality of arc-shaped notches are arranged in a ring array on one side of the friction disc one towards the friction disc two; and a plurality of transmission convex shafts capable of being clamped into the arc-shaped notches are fixedly connected in a ring array on the side of the support shaft away from the circular ring plate one.

[0019] Compared with the prior art, the present application has the following advantages: The scheme solves the problem that large-scale sludge solidification treatment by heating causes sharp increase of energy consumption and cost. The scheme binds the magic tape bandage on the upper body, so that the support shaft and the sleeve piece are close to the body, thereby ensuring that the support shaft, the sleeve piece and the connecting rod are in vertical state. When the single-cylinder engine is running, the stirring paddle assembly is driven to rotate by the transmission shaft to achieve the mixing and stirring effect of the slurry. When the support main shaft is inclined, the connecting rod one will also be inclined. At this time, the support main shaft, the support rod, the connecting rod one and the connecting rod two form a parallel four-bar linkage, so that the support rod also maintains a vertical state. When the bottom of the support rod contacts the bottom of the slurry pool, the bottom end of the support main shaft cannot move downward any more, thereby avoiding the situation that the bottom end of the stirring paddle assembly contacts the bottom of the solidification pool during rotation and is damaged. The spring combination piston telescopic rod contacts the bottom of the solidification pool and continues to move downward with the support main shaft, which compresses the spring combination piston telescopic rod, so that the hydraulic oil in the spring combination piston telescopic rod is input into the hydraulic piston telescopic jack through the oil channel pipeline, thereby pushing the hydraulic piston telescopic jack to elongate. At this time, the output end of the hydraulic piston telescopic jack pushes the flange part to move and compresses the spring part to store energy. At this time, the friction disc two is out of contact with the friction disc one and the stirring paddle body stops rotating, further avoiding the situation that the flange part collides with the bottom of the solidification pool and is damaged. During the process of the friction disc two out of contact with the friction disc one, the transmission convex shaft also drives the stirring paddle body to continue to rotate through the cooperation of the arc-shaped notch, thereby avoiding the situation that the support rod is slightly shortened when it is deeply immersed in the slurry in the solidification pool, which causes the transmission between the friction disc two and the friction disc one to be disconnected. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the structure of the magic tape bandage of the present application; Figure 3 It is a schematic diagram of the front planar structure of the present application; Figure 4 It is a schematic diagram of the back planar structure of the present application; Figure 5 It is a schematic diagram of the partial cross-sectional structure of the support main shaft from the top; Figure 6 It is a schematic diagram of the partial front cross-sectional structure of the support main shaft; Figure 7 For Figure 6 enlarged view of A in the middle; Figure 8 For the structure diagram of the stirring paddle body of the application; Figure 9 For Figure 8 enlarged view of B in the middle.

[0021] In the figure: 1, support main shaft; 11, flow baffle; 12, circular ring plate one; 13, handle; 2, single cylinder engine; 21, transmission shaft; 22, friction disc one; 23, arc-shaped notch; 3, stirring paddle assembly; 31, stirring paddle body; 32, spring part; 321, circular ring plate two; 33, flange part; 34, friction disc two; 341, transmission convex shaft; 4, protection mechanism; 41, support rod; 411, spring combined piston telescopic rod; 42, connecting rod one; 43, connecting rod two; 431, spring telescopic rod; 44, sleeve part; 45, support shaft; 46, magic tape binding belt; 5, hydraulic piston telescopic ejector rod; 51, oil line pipeline. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0023] As Figures 1 to 9 shown, the application provides a preparation method of a sludge solidification and dredging body by microbial directional mineralization, comprising the following steps: S1, removing impurities in original sludge, and measuring initial water content and organic matter content, adjusting the water content of the sludge to 60%-80% to form a flowable sludge slurry, and storing the sludge slurry in a solidification pool; S2, compounding Bacillus pasteurii and Bacillus licheniformis at a ratio of 3:1 in terms of viable cell number, adding a composite protective agent containing yeast extract, proteose peptone, trehalose and glycerol after centrifugal concentration, and preparing a high-concentration composite bacterial agent liquid with a viable cell concentration not less than ; S3, adding the composite bacterial agent liquid prepared in step S2 to the solidification pool in S1 at a ratio of CFU bacterial cell number to 1 kg of dry soil, adding a glue liquid at a ratio of 2:1 in terms of volume ratio of the composite bacterial agent liquid to the glue liquid, then mixing through a stirring device, and after mixing is completed, curing for 6-12 hours, the glue liquid being a mixed solution of urea and calcium acetate; S4, vacuum preloading or pressurized dewatering is carried out on the sludge system after reaction, wherein the vacuum degree of vacuum preloading is 80-95 kPa, the pressure of pressurized dewatering is 50-200 kPa, and the dewatering time lasts for 24-48 hours; then, sealing curing is carried out at 20-30 DEG C for 7-14 days, and a microbial directional mineralization sludge solidified dredging body is obtained; The concentration of urea and calcium acetate in the glue solution in S3 is 0.5-1.5 mol / L; the standing curing time in S3 is 9 hours; and the dewatering step in S4 adopts vacuum preloading with a vacuum degree of 90 kPa, and pressurized dewatering with a pressure of 100 kPa, and the dewatering time is 36 hours.

[0024] By using the above scheme, the impurities in the original sludge are removed, the slurry is stored in the solidification pool, then the composite microbial agent liquid and the mixed solution of urea and calcium acetate are added to the solidification pool in proportion, stirred and standing curing for 6-12 hours, and then pressurized dewatering is carried out, so that a microbial directional mineralization sludge solidified dredging body is finally obtained, which solves the problem that the large-scale sludge solidification treatment by heating will cause a sharp increase in energy consumption and cost; The application also provides a microbial directional mineralization sludge solidified dredging body preparation device, which comprises the stirring equipment in S3, and the stirring equipment comprises a support main shaft 1, a single-cylinder engine 2 and a stirring paddle assembly 3; the single-cylinder engine 2 is fixedly installed at one end of the support main shaft 1, the stirring paddle assembly 3 is rotationally connected to the other end of the single-cylinder engine 2, the output end of the single-cylinder engine 2 is a transmission shaft 21 which is movably arranged in the support main shaft 1, one end of the transmission shaft 21 is in transmission connection with the stirring paddle assembly 3, a handle 13 is fixedly connected to the support main shaft 1, and a flow baffle 11 is fixedly installed at the end of the support main shaft 1 close to the stirring paddle assembly 3. A protection mechanism 4 is installed on the support main shaft 1; the protection mechanism 4 comprises a support rod 41 which is hingedly connected to the support main shaft 1 and close to the stirring paddle assembly 3, the other end of the stirring paddle assembly 3 is hingedly connected with a connecting rod two 43, the connecting rod two 43 is hingedly connected with a connecting rod one 42 which is parallel to the axis direction of the support main shaft 1, the other end of the connecting rod one 42 is hingedly connected with the support rod 41, a sleeve piece 44 is fixedly connected to the rod body part of the connecting rod two 43, a support shaft 45 is rotationally connected to the sleeve piece 44, the top end and the bottom end of the support shaft 45 can extend to the outside of the sleeve piece 44 and are fixedly connected with magic tape bands 46; when the support main shaft 1 is inclined, the height of the bottom end of the support rod 41 is lower than the height of the bottom of the stirring paddle assembly 3.

[0025] With the above scheme, when the mixed solution of the composite microbial agent liquid, urea and calcium acetate is stirred in the solidification tank, the magic tape band 46 is bound on the upper body, so that the support shaft 45 and the sleeve member 44 are close to the body, thereby ensuring that the support shaft 45, the sleeve member 44 and the connecting rod two 43 are in vertical state. When the single-cylinder engine 2 is running, the stirring paddle assembly 3 will be driven to rotate by the transmission shaft 21 to realize the mixing and stirring effect of the sludge slurry. When the support main shaft 1 is inclined, the connecting rod one 42 will also be inclined. At this time, the support main shaft 1, the support rod 41, the connecting rod one 42 and the connecting rod two 43 form a parallel four-bar linkage, so that the support rod 41 also maintains a vertical state. When the bottom of the support rod 41 contacts the bottom of the sludge slurry tank, the bottom end of the support main shaft 1 cannot move downward any more, thereby avoiding the situation that the bottom end of the stirring paddle assembly 3 contacts the bottom of the solidification tank and is damaged when it rotates.

[0026] As shown in Figures 2-8 the connecting rod two 43 is hingedly connected with a spring telescopic rod 431 at the bottom end, and the top end of the spring telescopic rod 431 is hingedly connected with the connecting rod one 42; The stirring paddle assembly 3 comprises a stirring paddle body 31 which is rotationally connected to the bottom end of the support main shaft 1 and can move axially at the bottom end thereof. The part of the stirring paddle body 31 inside the support main shaft 1 is provided with a flange portion 33 and a friction disc two 34. A spring member 32 is further sleeved on the stirring paddle body 31. A circular ring plate two 321 is movably sleeved at the bottom end of the cavity of the support main shaft 1. The two ends of the spring member 32 are fixedly connected with the flange portion 33 and the circular ring plate two 321 respectively. The bottom end of the transmission shaft 21 is a friction disc one 22. The stirring paddle body 31 is frictionally connected between the friction disc two 34 and the friction disc one 22 under the action of the spring force of the spring member 32. The support main shaft 1 cavity is fixedly connected with a circular ring plate one 12 between the flange portion 33 and the friction disc two 34. The circular ring plate one 12 is movably sleeved on the outer periphery of the shaft body part of the stirring paddle body 31. The bottom end of the support rod 41 is a spring combined piston telescopic rod 411. A group of hydraulic piston telescopic jacks 5 in symmetrical direction are fixedly connected to one side of the circular ring plate one 12 facing the flange portion 33. One end of the hydraulic piston telescopic jack 5 is fixedly connected with an oil channel 51. One end of the oil channel 51 extends to the outside of the support main shaft 1 and is fixedly connected with the top end of the spring combined piston telescopic rod 411.

[0027] Adopting the above scheme, the spring combination piston telescopic rod 411 is in contact with the bottom of the solidification pool and is continuously lowered with the support main shaft 1, so that the spring combination piston telescopic rod 411 is compressed, thereby inputting the hydraulic oil in the inside thereof into the hydraulic piston telescopic top rod 5 through the oil way pipeline 51, and further pushing the hydraulic piston telescopic top rod 5 to elongate, at this time, the output end of the hydraulic piston telescopic top rod 5 pushes the flange part 33 to move and makes the spring part 32 be compressed and store force, at this time, the friction disc two 34 is out of contact with the friction disc one 22 and makes the stirring paddle body 31 stop rotating, further avoiding the situation that the flange part 33 collides with the bottom of the solidification pool and is damaged.

[0028] As shown in Figures 7-9 The side of the annular plate one 12 towards the friction disc two 34 is provided with a plurality of ball bearings in a ring array; the side of the friction disc one 22 towards the friction disc two 34 is provided with a plurality of arc-shaped notches 23 in a ring array; the side of the support shaft 45 away from the annular plate one 12 is fixedly connected with a plurality of transmission convex shafts 341 which can be clamped into the arc-shaped notches 23.

[0029] Adopting the above scheme, in the process that the friction disc two 34 is out of contact with the friction disc one 22, the transmission convex shaft 341 also drives the stirring paddle body 31 to continue rotating through the cooperation of the arc-shaped notches 23, avoiding the situation that the support rod 41 is slightly shortened when it is deeply inserted into the sludge in the solidification pool, and the transmission between the friction disc two 34 and the friction disc one 22 is disconnected.

[0030] The working principle and use process of the present application are as follows: When the sludge liquid added with the mixed bacterial agent liquid and the glue liquid is mixed, the operator binds the magic tape band 46 on the upper body, so that the support shaft 45 and the sleeve part 44 are close to the body, thereby ensuring that the support shaft 45, the sleeve part 44 and the connecting rod two 43 are in a vertical state, when the single-cylinder engine 2 is running, the stirring paddle assembly 3 is driven to rotate by the transmission shaft 21 to realize the mixing and stirring effect of the sludge liquid, when the support main shaft 1 is inclined, the connecting rod one 42 also inclines, at this time, the support main shaft 1, the support rod 41, the connecting rod one 42 and the connecting rod two 43 form a parallel four-bar linkage, so that the support rod 41 also maintains a vertical state, when the bottom of the support rod 41 is in contact with the bottom of the sludge pool, the bottom end of the support main shaft 1 cannot move downward any more, thereby avoiding the situation that the bottom end of the stirring paddle assembly 3 is in contact with the bottom of the solidification pool and is damaged when it rotates; When the bottom of the support rod 41 is the spring combined piston telescopic rod 411, the spring combined piston telescopic rod 411 will be in contact with the bottom of the solidification tank, and as the support main shaft 1 continues to descend, the spring combined piston telescopic rod 411 will be compressed, so that the hydraulic oil in it is input into the hydraulic piston telescopic top rod 5 through the oil circuit pipeline 51, and then the hydraulic piston telescopic top rod 5 is pushed to elongate, at this time the output end of the hydraulic piston telescopic top rod 5 will push the flange part 33 to move and make the spring piece 32 be compressed and store force, at this time the friction disc two 34 will be out of contact with the friction disc one 22 and make the stirring paddle body 31 stop rotating, further avoiding the situation that the flange part 33 will be damaged by colliding with the bottom of the solidification tank; When the friction disc two 34 is in the process of being out of contact with the friction disc one 22, the transmission convex shaft 341 will also drive the stirring paddle body 31 to continue to rotate through the cooperation of the arc-shaped notch 23, avoiding the situation that the support rod 41 will be slightly shortened by the damping of the sludge in the sludge when it is deeply immersed in the sludge, and the transmission between the friction disc two 34 and the friction disc one 22 is disconnected.

[0031] It should be noted that in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0032] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a microbial directed mineralization sludge solidification dredging body, characterized in that, The method comprises the following steps: S1, removing impurities in the original sludge, and measuring the initial water content and organic matter content, adjusting the water content of the sludge to 60%-80% to form a flowing sludge body, and storing the sludge body in a solidification tank; S2, Paenibacillus pulvifaciens and Bacillus licheniformis are compounded according to the ratio of viable bacteria number 3:1, after centrifugal concentration, adding compound protective agent containing yeast extract, proteose peptone, trehalose and glycerol, to prepare high-concentration compound bacterial agent liquid with viable bacteria concentration not less than ​ S3, the composite microbial agent liquid prepared in step S2 is added into the solidification tank in step S1 CFU bacterial cell number and the mass of 1 kg of dry soil are added into the solidification tank in step S1, and a glue solution is added in a ratio of 2:1 of the volume of the composite microbial agent liquid to the volume of the glue solution, followed by mixing through a stirring device. After mixing is completed, curing is performed for 6-12 hours. The glue solution is a mixed solution of urea and calcium acetate. The concentration of urea and calcium acetate in the glue solution in S3 is 0.5-1.5 mol / L.

2. The method of claim 1, wherein the method further comprises: The standing and curing time in S3 is 9 hours.

3. The method of claim 1, wherein the method further comprises: The dehydration step in S4 uses vacuum preloading with a vacuum degree of 90 kPa, and pressure dewatering with a pressure of 100 kPa, and the dehydration time is 36 hours.

4. The method of claim 1, wherein the method further comprises: The stirring device in claim 1 comprises a support spindle, a single-cylinder engine and a stirring paddle assembly; 5. A device for preparing a microbial directed mineralization sludge solidification dredging body, characterized in that: The single-cylinder engine is fixedly installed at one end of the support spindle, the stirring paddle assembly is rotatably connected to the other end of the single-cylinder engine, and the output end of the single-cylinder engine is a transmission shaft movably sleeved in the support spindle. A handle is fixedly connected to the support spindle.

6. The method and apparatus for preparing the microbial directed mineralization sludge solidification dredging body according to claim 5, characterized in that: A flow baffle is fixedly installed at one end of the support spindle close to the stirring paddle assembly.

7. The method and apparatus for preparing a microbial directed mineralization sludge solidification dredging body according to claim 5, characterized in that: A protection mechanism is installed on the support spindle; 8. The method and apparatus for preparing a microbial directed mineralization sludge solidification dredging body according to claim 5, characterized in that: The protection mechanism comprises a support rod hingedly connected to the support spindle and close to the stirring paddle assembly, the other end of the stirring paddle assembly is hingedly connected with a connecting rod two, the connecting rod two is hingedly connected with a connecting rod one parallel to the axis direction of the support spindle, the other end of the connecting rod one is hingedly connected with the support rod, a sleeve piece is fixedly connected to the rod body part of the connecting rod two, a support shaft is rotatably connected to the sleeve piece, and the top end and the bottom end of the support shaft can extend to the outside of the sleeve piece and are fixedly connected with a magic tape strap; When the support spindle is inclined, the height of the bottom end of the support rod is lower than the height of the bottom of the stirring paddle assembly. The bottom of the connecting rod two is hingedly connected with a spring telescopic rod, and the top end of the spring telescopic rod is hingedly connected with the connecting rod one.

9. The method and apparatus for the production of microbial directed mineralization of sludge solidification dredged material according to claim 8, wherein: The stirring paddle assembly comprises a stirring paddle body rotatably connected to the bottom end of the support spindle and axially movable at the bottom end of the support spindle, the part of the stirring paddle body located in the support spindle is provided with a flange part and a friction disc two, a spring piece is further sleeved on the stirring paddle body, a circular ring plate two is movably sleeved at the bottom end of the cavity of the support spindle, and the two ends of the spring piece are fixedly connected with the flange part and the circular ring plate two, respectively; 10. The method and apparatus for preparing a microbial directed mineralization sludge solidification dredged material according to claim 8, wherein: The bottom end of the transmission shaft is a friction disc one, and the stirring paddle body is frictionally connected with the friction disc one through the friction between the friction disc two and the friction disc one under the action of the spring force of the spring piece; A circular ring plate one is fixedly connected in the cavity of the support spindle between the flange part and the friction disc two, and the circular ring plate one is movably sleeved on the outer periphery of the shaft body part of the stirring paddle body. ​ The bottom end of the supporting rod is a spring combined piston telescopic rod, one side of the circular plate towards the flange part is fixedly connected with a group of hydraulic piston telescopic jacks in symmetrical directions, one end of the hydraulic piston telescopic jack is fixedly connected with an oil channel pipeline, one end of the oil channel pipeline extends to the outside of the supporting main shaft and is fixedly connected with the top end of the spring combined piston telescopic rod; A plurality of ball bearings are arranged in an annular array on one side of the circular plate towards the friction disc two; A plurality of arc-shaped notches are annularly and arrayedly formed on one side of the friction disc one towards the friction disc two; A plurality of transmission convex shafts capable of being clamped into the arc-shaped notches are fixedly connected in an annular array on one side of the supporting shaft away from the circular plate one.

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